Combination drill and valve-grinder.



P. O. BLANCHARD. COMBINATION DRILL AND VALVE GRINDER.

APPLICATION FILED JAN. 20, 1910.

Patented July 12,1910.

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FREDERICK C. BLANCI-IARD, F BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THEASH- CROFT MANUFACTURING COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPORA-TION OF CONNECTICUT.

COMBINATION DRILL AND VALVE-GRINDER.

Specification of Letters Patent.

Patented July 12, 1910.

, To all whom it may concern:

Be it known that I, FREDERICK O. BLAN- CHARD, a citizen of the UnitedStates, and resident of Bridgeport,inthe countyof Fairfield and State ofConnecticut, have invented new and useful Improvements in CombinationDrills and Valve-Grinders, of which the following is a specification.

My invention relates to the construction of tools or machines in theclass of which breast drills are a typical example and consists ofimprovements whereby a tool or machine of this character is made capableof performing several functions or modifications of function selectivelyby means of simple adjusting devices. v t

In particular, my invention consists in improvements in tools of thisclassby which the same tool or machine may perform alternately thefunctions of the ordinary breast drill, reversible ratchet drill, or"valve grinder; that is to say, by means of certain adjustmentspresentlyto be-described continuous rotation vof the driving gear maycause a continuous rotation of the tool-mow ing shaft or holding member;or, if desired, an oscillatory or reversing rotation of the tool holdingmember; or by an oscillatory or baclcand-forth movement of the drivinggear, may operate as a ratchet drill in either direction. I

Furthermore, the specific mechanism with which I illustrate my inventioncomprises improvements which insure compactness, strength, durability,and ease of operation and adjustment.

illustrate an example of my invention,

' Figure 1 is an elevation, partly in section, .of a comb natlon breastdrill and valve grinder Fig. 2 is a cross sectional view taken along theline 2-2 of Fig. 1; and Fig. 3 is a detail which shows the pawl beamwhich forms a part of the tool or machine shown in Fig. 1.

The stock orframe of the tool, marked S, consists in part of arectangular framework S which embraces the principal mechanicallyoperated parts of the tool or machine.

.in 's t '25 at either end of the rectan ular b 7 b This rectangularframework is stiff and amply able to sustain all'the stresses which maybe brought to bear upon it in course of. operation. A shaft T is mountedin the bear framework S and is thus provided with ample support. Betweenthe bearings t, t and also mountedin the framework S is the driving gearG shown as the bevel gear which is secured to and driven by the crank M.

Loosely mounted upon the shaft T and meshing with-the driving gear G arethe two bevel pinions P, P. These pinions are provided withcircularinternal ratchets J, J. The ratchet teeth of the ratchet J are opposedin operative direction to those of the ratchet J. In order to providecontrollable engagement between the ratchets J or J and the shaft T, Ihave arranged two pawls I, I; preferably these are constructed as partsof a single piece or member, namely, the pawl beam N which is looselymounted and housed in the shaft T which is milled out at t toaccommodatethe pawl beam and its adjuncts- The pawl beam N is perforated at h andin this perforationthe pin I-I, secured to the shaft T, fits loosely soas to permit a movement of the beam N sidewise 1 one is ofgreater widththan the other, E in In the 'drawlngs hereto annexed which outward inresponse to the effort of the spring F and into engagen'ient with theratchet J. flVith the parts in this relation ship, movement of thedriving gearG will be communicated to the shaft T through the pinion P,ratchet J and pawl I. now,

actuator E be moved in the reverse direction sliding along the shaft Tit will first engage --w-ith the shouldern and press the pawl I out ofengagement with the ratchet J and will do this before the opposite endof the actuator leaves the shoulder n so that for an instant both pawlsI, I are released from engagement with their respective ratchets.Further movement of the actuator E will I then allow the pawl I toengage with the and in part rocking movement on the loose pivot H. I

When it is desired to impart to the shaft T an oscillating movement thefollowing mechanism is put in action: The hub of the gear G is bored outto receive the sliding crank shaft A which is pressed inwardly by asprin A and carries at its inner end the crank A pin B passes throughthe exposed end of the cran shaft A and engages at the will of theoperator with either of the notches O, C which are formed in thesemicircular flange C, which is preferably an integral part of the crankM. The operative portions of the crank A move between the flanges E, Eon the pawl actuating sleeve E. These 0 erative portions are best shownin Fig. 2. Sue of the operative portions A is formed as a bossprojecting inwardly from the crank A and the other A is a portion of thecrank A itself. The projection of the boss A? is such that the operativeportions A A are offset from each other so that as shown in Fig. 1 theboss A may act upon the smaller flange E while the operative portionA'*' acts u on the larger flange E With the pin B in the notch C thecrank shaft A 1s in its operative position and continuous rotation ofthe crank M causes the operative portions of the crank A A to engagealternately with the flanges E, E sliding the pawl actuating sleeve Ealternately back and forth. As above described this reciprocation of thesleeve E causes the pawls I and I to engage alternately with theratchets J and J and consequently alternately drives the shaft T throughthe pinions P, P. Consequently any tool secured in the chuck T will begiven an oscillating movement.

In order to adapt this tool or machine as perfectly as possible to thework of valve grinding, the operative portions of the crank A are set atan angle one to the other so that in the ordinary right handed rotationof the gear G, the operative portion A leads the o eratiye portion A andconsequently the pinion P will be in engagement with the shaft T duringthe larger portion of any one If it be desired to use the tool as aratchet drill the parts are left in the same positions and relation asshown in Fig. 1 and an oscillating movement is given to the drivingcrank M, care being taken not to allow this oscillating movement toproceed far enough in either direction to throw the sleeve E and thusreverse the driving relations in the train of mechanism.

If it be desired to use the tool ormachine as an ordinary breast drill,the crank shaft A is moved outward and turned so that the pin B islodged in the notch C. This movement removes the boss E beyond thelimits of the smaller flange E but still within the limits of the largerflange E Continuous rotative movement of the driving crank M insuresengagement between pawl I and ratchet J and places the tool or machinein condition for ordinary work as a breast drill.

The steadying handle L may be secured in any one ofseveral tapped holesK as best suits the operator.

What I claim and desire to secure by Letters Patent is:

1. The combination, in a suitable frame, of a revolubly mounted shaft, adriving gear, two pinions loosely mounted on the shaft, respectivelprovided with ratchets mutually oppose in o erative direction, a beam,mounted to root relatively to the shaft, and provided with twooppositely directed pawls, appropriate respectlvely to the ratchets, anda pawl actuator movably mounted on the shaft, to determine thealternative engagement of the pawls with the operative ratchets.

2. The combination, in a suitable frame, of a revolubly mounted shaft, adriving gear, two pinions loosely mounted on the shaft, respectivelprovided with ratchets mutually opposed in operative direction, a beammounted to rock relatively to the shaft, and provided with twooppositely directed pawls, appropriate respectively to the ratchets, anda pawl actuator movably mounted on the shaft, to determine thealternative engagement of the pawls with their operative ratchets, and apawl actuator controller carried by the driving gear.

3. The combination, in a suitable frame,

of a revolubly mounted shaft, a driving gear, two pinions looselymounted on the shaft, provlded respectively with ratchets, mutuallyopposed in operative direction, two pawls appropriate respectively tothe ratchets, and alternately engage'able therewith,

, provided respective the said pawls movably mounted and housed in theshaft, a pawl actuator movably mounted on the shaft to determine thealternative engagement of the pawls with their respective ratchets, anda pawl actuator controller carried by the driving gear.

4. The combination, in a suitable frame, of a revolubly mounted shaft, adriving gear, two pinions mounted on the shaft, provided respectivelywith ratchets mutually opposed inoperative direction, a beam housed inthe shaft and mounted to rock in its housing, springs supporting thebeam, two oppositely directed pawls, appropriate respectively to theratchets, carried by the beam, and a pawl actuating sleeve shdablymounted on the shaft over the beam-housing, to determine the alternativeengagement of the pawls with their respective ratchets.

5. The combination, in a suitable frame, of a revolubly mounted shaft, adriving gear, two pinions mounted on the shaft, provided respectivelywith ratchets mutually opposed in operative direction, a beam housed inthe shaft and mounted to rock in its housing, springs supporting thebeam, two oppositely directed pawls, appropriate respectively to theratchets, carried by the beam, a pawl actuating sleeve slidably mountedon the shaft over the beam-housing, to determine the alternativeengagement of the pawls with their respective ratchets, and a controllercarried by the driving gear, to slide said sleeve reciprocally.

6. The combination, in a suitable frame,

of a revolubly mounted shaft, a driving gear, two pinions looseliymounted on the shaft,

y with ratchets mutually opposed in o eratlve direction, a beam mountedto roc relatively to the shaft, and provided with two oppositelydirected pawls,

appropriate respectively to the ratchets, a

pawl actuator movably mounted on the shaft, to determine the alternativeengagement of the-pawls with their respective ratchets, and adisengageable pawl actuator controller carried by the driving gear.

7..The combination, in a suit-able frame, of a revolubly mounted shaft,a driving gear, two pinions loosely mounted on the shaft, providedrespectively with ratchets, mutually opposed in operative direction, twopawls appropriate respectively to the ratchets, and alternatelyengagable therewith, the said pawls movably mounted and housed on theshaft, a pawl actuator movably mounted on the shaft to determine thealternative engagement of the 'pawls with their respective ratchets, anda disengageable pawl actuator controller carried by the driving gear.

8. The combination, in a suitable frame, of a revolubly mounted shaft, adriving gear, two pinions mounted on the shaft, provided respectivelywith ratchets mutually opposed in operative direction, a beam housed inthe shaft and mounted to rock in its housing,

two oppositely springs supporting the beam, directed pawls, appropriaterespectively to the ratchets, carried by the beam, a pawl actuatingsleeve slidably mounted on the shaft over the beam-housing, to determinethe alternative engagement of the pawls with their respective ratchets,and a disengagable controller carried by the driving gear to slide saidsleeve reciprocally.

9. The combination, in a of a revolubly mounted shaft, a driving gear,two pinions loosely mounted on the shaft, provided respectively with ratchets mutually opposed in operative direction, a beam housing in. theshaft and. mounted to. rock in its housing, positely directed pawls,appropriate respectively to the ratchets, carried at the ends of thebeam, and a pawl actuating sleeve slidably mounted on the shaft engagingwith the beam at either end alternately to depress an end of the beaminto the housing, and re lease the other end of the beam to allow engagementof pawl and ratchet.

10. The combination, in a suitable frame,

springs supporting the beam, op-

of a revolubly niounted shaft, a driving gear,,.

two pinions loosely mounted on the shaft, provided respectively withratchets mutually opposed in operative direction, a beam housed in theshaft and mounted to rock in its housing, springs supporting the beam,oppositely directed pawls, appropriate respectively to the ratchets,carried at the ends of the beam, a pawl actuating sleeve slidablymounted on the shaft engaging with the beam at either end alternately,to depress an end of the beam into the housing, and release the otherend of the beam to allow engagement of pawl and ratchet, and meanscarried by the driving sleeve reciprocally.

11. The combination, in a suitable frame, of a revolublymounted shaft, adriving gear, two pinions loosely mounted on the shaft," providedrespectively with ratchets mutually opposed in operative direction, abeam housed .in the shaft and mounted to rock in itshousing, springssupporting the beam, oppositely directed pawls, appropriate respectivelyto the ratchets, carried at the ends of the beam, a pawl actuatingsleeve slidably mounted on the shaft engaging with the beam at eitherend alternately to depress an end of the beam into the housing, andrelease the other end of the beam to allow engagement of the pawl andratchet, and dis engagable means carried by the drivinggear to slidesaid sleeve reciprocably.

12. The combination, in a suitable frame, of a revolubly mounted shaft,a driving ear. two pinions loosely mounted on the s aft, providedrespectively with ratchets movably opposed in operative chrection, twopawls appropriate respectively to the ratchets and gear to slide saidpawlsjm'ovably mouilted and housed in the shaft, a pawl actuatingsleeve, slidably mounted on the shaft, to'determine the alternativeengagement of the parts with their respective ratchets, and acontrollercarried by the drivinggear to slide said sleeve reciprocally.v

14. The combination, in a suitable frame, of a revolubly mounted shaft,a driving ear,- two inions loosely mounted on the s aft, providedrespectively with ratchets mutually opposed in operative direction, twopawls -of a revolubly mounted shaftta driving, ear,

appropriate respectively to the ratchets and alternately engageabletherewith, the said pawls movably mounted and housed in the shaft, apawl actuating sleeve, slidably mounted on the shaft and provided with aflange at either end, a crank carried by the driving gear revolvinbetween and alter- 'flnately engaging the s eeve flanges to slide thesleeve reciprocally.

15. The combination, in a suitable frame, of a 'revolubly mounted shaft,provided respectively with ratchets mutually opposed in operativedirection, two pawls appropriate respectively to the ratchet andalternately engageable therewith, the said pawls mov- I ab y mounted andhoused in the shaft, 21' pawlactuating sleeve slidably mounted on"theshaft and provided with a flange at either end, a crank carried bythe driving gear revolving between and alternately engagingthe sleeveflanges toslide the sleeve reciprocally, said crank having two engagi'ngmembers, one for each flange, one of said members set in advance of theother, to ,slide the sleeve reciprocally and unequally in I point oftime.

16. The combination, in a suitable frame, of a revolubly mounted shaft,a driving bevel gear, two bevel inions loosely mounted on the shaft,provi ed respectively with ratchets mutually opposed in operativedirection, a loosely mounted beam housed in the shaft, two oppositelydirected pawls appropriate respectively to the ratchets, "each at oneend of the beam, springs supporting the beam and pressing it toward theratchets, a pawl actuating s eeve slidably mounted on the shaft over thebeam housing, to determine the alternate engagement of the pawls withtheirrespective ratchets, a crank shaft concentric.

with and slidable in the drivin bevel gear, a V

crank on the shaft, said cran having two engaging members, one set in.advance of the other, flanges on the pawl actuating sleeve in path ofthe engaging members on the crank, and means to retract the crank shaftand crank out of normal engagement position relatively to the sleeveflanges.

17. The combination, in a suitable frame, of a revolubly mounted shaft,a driving gear, two pimons loosely mounted on the shaft, providedrespectively with ratchets mutually opposed in operative direction, abeam mounted in the shaft between the pinions and mounted to rock in itshousing, sprin s supporting the beam, oppositely d1- recte pawls,appropriate respectively to the ratchets, carried at the ends of the,beam,

and a pawl actuating sleeve slidably' ifrlounted on the shaft engagingwith the beam at either end alternately to depress an end 'of the beaminto the housing and release the" other end of the beam to allowengagement of the awl and ratchet.

18. he combination, ina suitable frame,

and a pawl alternately, to depress an end of the beam into the housing,of the beam to a pawl'and ratchet and means carried by the driving gearto slide said'sleeve reciprocally.

19. The combination in a suitable frame, of a revolubly mounted shaft, adriving aind release the otherend low engagement of the gear, two pmionsloosely mounted on the shaft, provided respectively with ratchetsmutually opposed in operative direction, a beam housed in the shaftbetween the pinions and mounted to rock in its housing, sprin ssupporting the beam, oppositely d1- recte pawls, appropriaterespectively to the ratchets, carried at the ends of the beam, a pawlactuating sleeve. slidably mounted on the shaftenga 'ng with the beam ateither end alternate y, to depress an end of the beam to allow enga entof pawl and ratchet, and disengageab e means carried by the driving gearto slide said sleeve re ciprocally.

20. The combination, in a suitable frame, of a revolubly mounted shaft,a driving gear, two pinions loosely mounted on the shaft, providedrespectively with ratchets mutually opposed 1n. operative direction, twopawls appropriate respectively to the ratchets and alternatelyengageable therewith, the said pawls movably mountediand housed 1n theshaft, a pawl actuating sleeve,

slidably mounted on the shaft between the pinions to determine thealternative ment of the ratchets.

21. The combination, in a suitable frame, of a revolubly mounted shaft,a driving gear, two pinions loosely mounted on the shaft, providedrespectively with ratchets engageparts with their respective mutuallyopposed 1n operative direction,

two pawls appropriate respectively to the ratchets and alternatelyengageable therewith, the said pawls movably mounted and housed in theshaft, a pawl actuating sleeve, slidably mounted on the shaft betweenthe pinions to determine the alternative engagement of the parts withtheir respective ratchets, and a controller carried by the driv ing gearto slide said sleeve reciprocally.

22. The combination, in a suitable frame, of a revolubly mounted shaft,a driving gear, two pinions loosely mounted on the shaft, providedrespectively with ratchets mutually opposed in operative direction, twopawls appropriate respectively to the ratchets and alternatelyengageable therewith, the said pawls movably mounted and housed in theshaft, a pawl actuating sleeve, slidably mounted on the shaft betweenthe pinions and provided with a flange at either efiid,-'a crank carriedby the driving gear revolving between and alternately engaging thesleeve flanges to slide the sleeve reciprocally.

23. The combination, in a suitable frame, of a revolubly mounted. shaft,a driving gear, two pinions loosely mounted on the shaft, providedrespectively with ratchets mutually opposed in operative direction, twopawls appropriate respectively to the ratch' ets and alternatelyengageable' therewith, the said pawls movably mounted and housed in theshaft, a pawl actuating sleeve slidably mounted on the shaft between thepinions and provided with a flange at either end, a crank carried by thedriving gear revolving between and alternately engaging the sleeveflanges to slide the sleeve reciprocally, said crank having two engagingmembers, one for each flange, one of said engaging members set inadvance of the other, to slide the sleeve reciprocally and unequally inpoint of time.

24. The combination, in a suitable frame,

of a revolubly mounted shaft, a driving bevel gear, two (pinions looselymounted on the shaft, provi ed respectively with ratchets mutuallyopposed in operative direction, a loosely mounted beam, housed in theshaft between the pinions, two oppositely directed pawls appropriaterespectively to the ratchets, each at one end of the beam, springssupporting the beam and pressing it toward the ratchets, and a .pawlactuating sleeve slidably mounted on the shaft over the beam housing, todetermine the alternate engagement of the pawls with their respectiveratchets, a crank-shaft concentric with and slidable in the drivingbevel gear, a crank on the shaft, flanges on the pawl actuating sleevein the path of the crank, and means to retract the crank shaft and crankout of normal engagement position relatively to the sleeve flanges.

25. The combination, in a suitable frame, of a revolubly mounted shaft,a driving bevel gear, two bevel pinions loosely mount ed on the shaft,provided respectively with ratchets mutually opposed in operativedirection, a loosely mounted beam housed in the shaft between thepinions, two oppositely directed pawls appropriate respectively to theratchets, each at one end of the beam, springs supporting the beam andpressing it toward the ratchets, a pawl actuating sleeve slidablymounted on the shaft over the beam housing, to determine the alternateengagement of the pawls with their respective ratchets, a crank shaftconcentric with and slidable inthe driving bevel gear, a crank on theshaft, said crank having two engaging members, one set in advance of theother, flanges on the pawl actuating sleeve in the path of the engagingmembers on the crank, and means to retract the crank shaft and crank outof normal engagement position relative to the sleeve flanges.

Signed by me at Bridgeport, Connecticut this 15th, day of January 1910.

FREDERICK C. BLANCHARD. lVitnesses:

W. R. CLARKE,

JAMES P. ONE'IL.

